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    Waveform design of discovery signals
    2.
    发明授权
    Waveform design of discovery signals 有权

    公开(公告)号：US11343666B2

    公开(公告)日：2022-05-24

    申请号：US16239383

    申请日：2019-01-03

    Applicant: QUALCOMM Incorporated

    Inventor： Navid Abedini ,  Zhibin Wu ,  Junyi Li ,  Sudhir Kumar Baghel ,  Kapil Gulati ,  Libin Jiang

    IPC: H04W8/00 ,  H04W72/00 ,  H04B7/06 ,  H04B7/08 ,  H04L5/00 ,  H04L27/26 ,  H04L27/00

    Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a wireless device may broadcast a discovery preamble to identify a receiving device or to identify a suitable beam for communicating with a receiving device prior to broadcasting a discovery message to the receiving device. In such systems, the wireless device may use the techniques described herein to generate the discovery preamble and to reduce interference between discovery preamble transmissions and avoid data loss. In one example, a wireless device may append a cyclic prefix (CP) to a discovery preamble with a suitable length to protect the discovery preamble from interference from another transmission. In another example, the wireless device may generate a cyclically periodic signal including multiple copies of the discovery preamble so a receiving device may be able to receive a portion of the signal and identify the discovery preamble.

    Demodulation reference signal design for vehicle-to-vehicle communication
    3.
    发明授权
    Demodulation reference signal design for vehicle-to-vehicle communication 有权

    公开(公告)号：US11095411B2

    公开(公告)日：2021-08-17

    申请号：US15662134

    申请日：2017-07-27

    Applicant: QUALCOMM Incorporated

    Inventor： Libin Jiang ,  Shailesh Patil

    IPC: H04L5/00 ,  H04L29/08 ,  H04W72/12 ,  H04W4/06 ,  H04W4/46

    Abstract: Various features described herein relate to DM-RS design for a control channel and a data channel that maybe used for vehicular communications. In an aspect, a UE may determine a base DM-RS sequence associated with a control channel for V2V communication. The UE may further determine a DM-RS sequence based on the base DM-RS sequence and an identity of the UE, and transmit a plurality of DM-RS symbols within the control channel in a subframe using the DM-RS sequence. In another aspect, a UE may generate a plurality of DM-RS sequences, each DM-RS sequence maybe generated for a corresponding DM-RS symbol of a plurality of DM-RS symbols associated with a data channel for V2V communication based on a DM-RS symbol number of the corresponding DM-RS symbol. The UE may transmit the plurality of DM-RS symbols within the data channel in a subframe using the plurality of DM-RS sequences.

    Discovery procedure signaling
    4.
    发明授权
    Discovery procedure signaling 有权

    公开(公告)号：US10952127B2

    公开(公告)日：2021-03-16

    申请号：US16241787

    申请日：2019-01-07

    Applicant: QUALCOMM Incorporated

    Inventor： Navid Abedini ,  Zhibin Wu ,  Junyi Li ,  Sudhir Kumar Baghel ,  Kapil Gulati ,  Libin Jiang

    IPC: H04W48/10 ,  H04L1/00 ,  H04L27/26 ,  H04L1/16 ,  H04W48/16 ,  H04J13/00 ,  H04W8/00 ,  H04W40/24 ,  H04B7/06 ,  H04J11/00 ,  H04B7/08 ,  H04W4/40

    Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems support beamforming to improve the reliability of transmissions from a transmitting device to a receiving device. In some cases, a wireless device broadcasts information using beamforming. In such cases, in order to limit the overhead and power consumption associated with the broadcast, the wireless device utilizes the techniques described herein for broadcasting information using beamforming. In particular, rather than broadcasting large amounts of data in a beam-sweep, a wireless device broadcasts a relatively lightweight signal in a beam-sweep to first identify a receiving device and/or a suitable beam for communicating with a receiving device. Once the transmitting device identifies the receiving device and/or the suitable beam, the transmitting device broadcasts the data to be received by the receiving device.

    System and method for ranging-assisted vehicle positioning
    7.
    发明授权
    System and method for ranging-assisted vehicle positioning 有权

    公开(公告)号：US10715977B2

    公开(公告)日：2020-07-14

    申请号：US16228051

    申请日：2018-12-20

    Applicant: QUALCOMM Incorporated

    Inventor： Libin Jiang ,  Junyi Li ,  Sudhir Kumar Baghel ,  Shailesh Patil

    IPC: H04W4/46 ,  H04W72/12 ,  G01S5/00 ,  H04W64/00 ,  G01S5/02 ,  H04W16/14 ,  H04W72/04 ,  G01S1/04

    Abstract: Aspects of the present disclosure are directed to device-to-device (D2D) and, more particularly, vehicle-to-vehicle (V2V) communication in which an efficient ranging protocol allows efficient ranging-assisted vehicle positioning. A vehicle transmits a first slot ID in a first control period, to indicate a first time slot for transmitting a first ranging signal in a ranging cycle including a plurality of time slots. The vehicle transmits the first ranging signal in the first time slot in the ranging cycle. From a second vehicle, the first vehicle receives a second ranging signal in a second time slot that is different from the first time slot in the ranging cycle. The first vehicle determines a first time-of-arrival (ToA) of the second ranging signal when received by the first vehicle, and transmits the first ToA in a second control period.

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